William h



wlLLlAM H. LAWRENCE. Improvement in Self-Extinguishing Safety-Cans for Combustible Materials. No, 114:45()l PawmedMay 2,1871.

that@ hm WILLIAM H. LAWRENCE, 0F WILLIAMSBURG, NEW YORK.

Letters Patent No. 114,450, dated May 2, 1871.

IMPROVEMENT IN SELF- EXTINGUISHING SAFETY-CANS FOR COMBUSTIBLE MATERIALS.

The Schedule referred to In these Letters Patent and making part of the same.

To all whom tt may concern Be it known that I, WILLIAM H. LAWRENGE, ot' Williamsburg, in the county of Kings and State of -New York, have invented a new and improved Safety-Can for Combustible Matter; `and I do hereby declare that the following is a fnll,":lear, and exact description thereof, which will enable others skilled in the art tofmake and use the same, reference being had to the accompanying drawing forming part of this specification. Figure l represents a vertical central section of my improved safety-can. Figure 2 is a top View Of the same Without the cover.

Similar letters of reference indicater corresponding parts.

Ihis invention has fhr-itstebjectto providea safe receptacle for oil7 oil rags, and other matter considered spontaneously combustible, so thatif ignited the lire will at once hel extinguished Aby the force of its own heat.

The invention consists in placing the receptacleof the combustible matter within an outer yessel whichV dangerous waste and greasy rags produced or psed in shops'and engine-rooms is provided, and all danger of ignition from their spontaneous combustion averted.

-A in 'the' drawing represents a sheetmetal vessel of cylindrical or other form and suitable size.

It has a perforated supporting-flange, a, or suitable standard, and can be closedby a cover or lid, B.

C is Ya sheet-metal can or Vessel of suitable form and somewhat smaller and shorter than A. It is put within the vessel Aand supported therein by suitable feet or projections b, so that a space', c, is left Within A, around and under C.

d d are hinged clasps aixed to the inner side of A to lock over theV edge of O and hold it down on its supports.

.Combustible matter is put within the can C and water into the space c surrounding the can. The cover is then closed.

The can 4C does not reachup to the cover, and is therefore open to the steam which is created by the heat of the lire in case matter within C should be ig. -nitedg the steam entering the vessel will immediately extinguish theV iire.

I prefer to make the under side of the cover of conical form, as' showin-that is to say, make it deeper in the middle, so that it will properly guide the steam to the re. 4

Having thus described my invention,

I claim as new and desire to secure by Letters Patent; l

l. The safety-can G placed into the closed-water vessel A in such manner that the heat of any ire within G will create steam to extinguish the ire, as set forth.

2. The hinged clasps d d, applied to the outer vessel A to hold down the can C and prevent it from floating, asl specilied.

3. The cover B of the vessel A, made conical ou the under side, as specified.

WILLIAM H. LAWRENCE..

Witnesses:

Geo. W. MABEE, ALEX. F. ROBERTS. 

